The actor, who played Meghan’s on-screen husband Mike Ross in the drama, posted a picture of Suits cast members seated around a table at a restaurant near to Windsor, where the bride-to-be will marry Prince Harry.

The 36-year-old Canadian actor captioned the image: “The last supper #royalwedding.”

And he later wrote: “Going to bed now and thinking a lot about the strange surreal and wonderful day my friend Meghan is going to have tomorrow.

“Meghan – wherever you are – we are so grateful to be here to watch you both take this monumental step together. Love deeply and live well.”

He and his wife, Pretty Little Liars actress Troian Bellisario, were previously pictured at the Royal Standard of England pub in Beaconsfield, Buckinghamshire, in a post on Instagram.

A post shared by Priyanka Chopra (@priyankachopra) on May 18, 2018 at 4:16pm PDT

Other showbiz names rumoured to be joining in the celebrations include Victoria and David Beckham, who were among the star guests at the wedding of the Duke and Duchess of Cambridge in 2011, and Sir Elton John and husband David Furnish.

Possible guests also include Ed Sheeran and Ellie Goulding, model Cara Delevingne and former Made In Chelsea star Millie Mackintosh.